Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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FLUID NOZZLE
Field of the Invention
This invention relates to a hand pump adapted for discharging fluid from a
portable container,
and particularly relates to a hand pump having a first and second valve means
for discharging
fluid from a portable container. The invention also relates to a method of
discharging fluid
from a portable container by use of a hand pump.
Background to the Invention
Various devises and methods have heretofore been used in the prior art to
deliver fluid from
one position to another. Such devices and methods include electrical pumps for
pumping
gasoline into automobiles or the lake. Other devices include hand pump devices
particularly
when delivering fluid from a gasoline container to a lawn mower or power boat.
In some
cases, the user typically manipulates a gasoline container that is tipped to
deliver gasoline to a
lawn mower or outdoor motor. Such devices and methods however can cause
spillage over
the lawn mower or gasoline motor and in some cases can be dangerous.
Prior art devices include the fluid dispensing nozzle construction disclosed
in United States
Patent No. 4,971,121 which relates to a belt construction that comprises a
valve body having
a dispensing spout extending therefrom, and a flexible bellows-like tube of
polymeric
material telescopically disposed on the spout and having opposed ends, one of
which is
secured to. the valve body and the other which carries a face seal for
engaging an annular lip.
Another device is disclosed in United States Patent No. 5,007,468 which
relates to a fluid
dispensing nozzle construction having a diaphragm sub-assembly comprising a
pin, a
diaphragm support carried by the pin, a diaphragm, and a diaphragm retainer
securing the
diaphragm to the pin with the diaphragm being disposed and sandwiched between
the
diaphragm retainer and the diaphragm support.
Yet another arrangement is shown in United States Patent No. 5,127,451 which
relates to a
fluid dispensing nozzle having a body in which fluid passage is formed.
Another arrangement is shown in United States Patent No. 5,273,087 which
relates to a
nozzle having a spout assembly comprising a fuel conduit for flow of gasoline
or other liquid
volatilizable hydrocarbon fuel in a fill opening or fill pipe into a
customer's tank.
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Another fluid nozzle is disclosed in United States Patent No. 5,992,479 which
relates to a
venturi shut off mechanism and an electronic pressure switch shut off
mechanism.
Furthermore United States Patent No. 6,126,047 and United States Patent No.
7,082,972 each
relate to a different fluid dispensing nozzle.
Also United States Patent No. 7,134,580 relates to a spout assembly for
dispensing liquid
from a nozzle.
U.S. Publication No. 2002/0189708 relates to a liquid supply nozzle having
automatic shut
down and a alarm function which will stop feeding a liquid when a diaphragm is
damaged.
Finally United States Patent Public No. 2006/0260712 relates to a fluid
dispensing nozzle
including a body, a handle connected to the body, a handle guard connected to
the body and
generally surrounding the handle, and a spout extending from the body.
Accordingly there is a need to provide an improved hand pump for dispensing
fluid such as
gasoline from a container which is both reliable, easy to use and safe.
These and other objects and features of the invention shall now be described
in relation to the
following drawings.
It is an aspect of the invention to provide a hand pump adapted to discharge
fluid from a
portable container comprising: means for reversibly attaching the hand pump to
the portable
container; means for directing fluid from the portable container into a
receiving container;
means for allowing the fluid to flow from the portable container to the
receiving container;
and means for causing the fluid to cease flowing from the portable container
to the receiving
container.
It is another aspect of the invention to provide A hand pump adapted to
discharge fluid from
a portable container comprising: a handle having a handle passage extending
therethrough; a
nozzle having a nozzle passage extending therethrough; a fluid chamber having
a lower fluid
reservoir associated at one end with the handle passage and at the other end
with a first end of
an upper fluid reservoir, wherein a second end of the upper fluid reservoir is
associated with
the nozzle passage; a piston movable within the upper fluid chamber; a trigger
pivotally
attached at a first end to an external end of the piston, and at a medial
position to a first end of
the handle; a fitting disposed between the second end of the upper reservoir
and the spout; a
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first needle extending through the upper reservoir from the internal end of
the piston through
the fitting into the nozzle passage; a first spring extending coaxially along
the first needle
from the internal end of the piston to the fitting; a first valve slidably
mounted coaxially on
the nozzle end of the first needle; a second spring disposed between the first
valve and the
nozzle end of the needle; a second needle in the lower reservoir having a
second valve
slidably mounted on its end; a fitting adapted for connection of the nozzle to
a portable
container.
Yet another aspect of this invention relates to a method of discharging fluid
from a hand
pump connected to a portable container said hand pump having an inlet and
outlet
comprising: attaching a fluid conduit from the inlet to the portable
container; the hand pump
having a first and second reservoir, and a channel there between; displacing a
trigger
associated with the hand pump so as to displace a piston in the first
reservoir and: open a first
valve associated with the first reservoir, so as to discharge fluid from the
first reservoir to the
outlet; close a second valve associated with the second reservoir in a fluid
discharge position;
displacing the trigger associated with the hand pump so as to displace the
piston in the first
reservoir and: close the first valve associated with the first reservoir; open
the second valve
associated with the second reservoir so as to fill the first and second
reservoir with fluid from
the portable container in a fluid drawing position.
Description of the Drawings
At Figure 1 is a perspective view from the front of the hand pump.
Figure 2 is a perspective view from the rear of the hand pump.
Figure 3 is a top plan view of the hand pump.
Figure 4 is a cross sectional view of the hand pump taken along the lines A-A
of Figure 3.
Figure 5 is another cross section view of the hand pump with the trigger in
the open position.
Figure 6 is another cross section view of the hand pump with the trigger in
the closed
position.
Figure 7 is an end view of the hand pump.
Figure 8 is a bottom view of the handle of the hand pump.
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Detailed Description of the Invention
In the drawings, preferred embodiments of the invention are illustrated by way
of example. It
is to be expressly understood that the description and drawings are only for
the purpose of
illustration and as an aid to understanding, and are not intended as a
defmition of the limits of
the invention.
Figure 5 generally discloses the hand pump 2 which comprises a body 4 having a
handle 5
with a trigger 6 and piston 8.
The hand pump 2 also includes a fluid chamber which comprises a first fluid
reservoir or
upper reservoir 10 and a second or lower fluid reservoir 12. The upper and
lower reservoirs
are connected together by a channel or passage way 14.
The hand pump 2 is adapted to be connected to a portable fluid container or
vessel (not
shown) by means of a connection 17 which is adapted to be connected to a fluid
conduit (not
shown) that connects the inlet 16 of the hand pump 2 to a fluid container (not
shown) by
means of a fluid conduit (now shown).
The handle 5 includes a passage way 20a which communications with passage 20b
disposed
in the body 4 as shown in Figure 5.
The passage 20 communicates with the inlet 16 so as to provide a passage for
the fluid being
drawn from the fluid container (not shown). The passage 20b communicates with
the second
or lower fluid reservoir 12 as shown.
The first fluid reservoir or chamber 10 is formed in the body 4 by any number
of means
including milling or drilling into the body so as to provide the chamber as
shown. The
chamber can be closed by means of a cover 22 which is attached to the body by
means of
screws 24.
The hand pump 2 is adapted to discharge fluid from a portable vessel or
container (not
shown) which comprises means for reversibly attaching the hand pump 2 to the
portable
container, means for directing fluid from the portable container into a
receiving container (not
shown); means for allowing the fluid to flow from the portable container to
the receiving
container; and means for causing the fluid to cease flowing from the portable
container to the
receiving container.
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In particular the means for reversibly attaching the hand pump 2 to the
portable container (not
shown) comprises a fitting 17 connected to the hand pump 2 wherein the fitting
17 has a
sealable adapter of a size and connection mechanism selected to reversibly
connect to an
opening in the portable container.
Moreover the means for directing fluid from the portable container (not shown)
into a
receiving container (not.shown) comprises an elongated nozzle 26.
The piston 8 includes an exterior end 28 which extends exteriorly of the hand
pump 2 and an
interior end 30 which is disposed in one end of the upper reservoir 10 as
shown in the figures.
The interior end of the piston 30 includes grooves 32 which are adapted to
retain 0-rings 34
and so as to provide a fluid type seal as shown.
The piston 8 is adapted to move or be displaced within the upper fluid
reservoir 10 from the
position shown in Figure 5 to the discharge position shown in Figure 6. The
piston 8 and
particularly the inner end 30 slides within the inner cylindrical bore of the
upper reservoir in a
tight manner so as to discharge the fluid in a manner to be disclosed herein.
The nozzle 26 connected to the first end of the upper reservoir 10 has an
outlet 40 and an
opposed second end 42.
A second passage 44 extends from the upper reservoir 10 through the nozzle 26
to the outlet
40.
A fitting 48 is disposed between the upper reservoir 10 and the nozzle 26 so
as to connect the
two together.
An activator 50 extends from the internal end 30 of the piston 8 through the
upper reservoir
10 through the fitting 48 into the second passage 44 through the nozzle 26 for
opening and
closing a first valve 60 as shown.
The activator 50 comprises a needle 52 extending from the internal end 30 of
the piston 8
through the upper reservoir 10 through the fitting 48 into the second passage
44 within the
nozzle 26 wherein the needle 52 has an annular protrusion 53 at a medial
position 54 having
an external diameter less than the internal diameter of the fitting 48.
The first valve 60 comprises a spherical stopper 62 has a hollow central
channel 64 slidably
connected to the needle 52 within the second passage 44 wherein the external
diameter of the
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stopper 62 is greater than the internal diameter of the fitting 48. In this
way the fitting 48
presents a valve seat while the spherical stopper 62 presents the valve.
The hand pump 2 includes a trigger 6 attached to a first end of the external
end of the piston
28 and at a medial position to the handle 5 about pin 99 , whereby movement of
the second
end of the trigger 7 about pin 97 between an open position and a closed
position as shown in
Figures 5 and 6 affects inward movement of the piston 8 and the activator 50
or needle 52 to
cause the protrusion 53 to dislodge the spherical stopper 62 from the valve
seat and
particularly the fitting 48 and allow fluid flow through the outlet 40.
Therefore when the piston 8 is moved from the open trigger position as shown
in Figure 5 to
the closed position shown in Figure 6 fluid in the first fluid chamber 10 is
pushed forward
with respect to Figure 5 so that the fluid pressure flows into the second
fluid chamber 12
thereby pushing the second valve 70 so as to stop the communication of fluid
between the
passage 20b and the second fluid reservoir 12. At the same time the fluid in
the first fluid
chamber 10 is pushed forwardly against the first spherical stopper 62.
The means for causing the fluid to cease flowing from the portable container
to the receiving
container comprises a first spring 80 which extends between the internal end
30 of the piston
8 and the first end of the fitting 48 wherein the first spring 80 is in
equilibrium in the trigger
open position as shown in Figure 5 and compressed in the trigger close
position shown in
Figure 6. Furthermore a second spring 86 extends between the second side of
the spherical
stopper 60 and a second end of the needle 52 wherein the second spring 86 is
an equilibrium
state in the trigger closed position shown in Figure 6 and a compressed state
in the trigger
open position shown in Figure 5.
The hand pump 2 also includes a positioner 90 for positioning the second valve
70 adjacent to
the passage 20b.
The positioner 80 comprises a stationary or second needle 80 which is adapted
to be received
by a cylindrical hole 72 which does not extend through the second spherical
stopper 70.
Accordingly as the fluid pushes against the second spherical stopper 72 it
pushes against the
valve seat 74 presented by the second passage 20b so as to stop the back flow
of fluid back
into the fluid container.
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The positioner or second needle 80 comprises a cylindrical extension from the
plug 84 that is
screwed into an end,of the second fluid reservoir as shown. Another plug 86 is
also screwed
into the body 4. The plug 86 blocks off a hole formed to the second fluid
reservoir 12 when
the channel or passage 14 is milled or drilled into the body in the forming
stage. The plugs
84 and 86 include threads 83 and 85 so as to threadedly engage the body 4 in a
fluid tight
manner. A retaining ring 88 is retained in an annular groove presented by the
needle 54 so as
to retain the second spring 86 as shown in the drawings.
A plug 92 is adapted to engage the outlet 40 and is connected to the hand pump
2 by means
of a cable 94. Also the plug 92 includes o-rings 90 so as to prevent the
escape of any fluid in
the passage 44.
The hand pump 2 includes pins 97 and 99 as well as a retaining ring 95 and a
washer 93.
Accordingly the hand pump 2 can be used to discharge fluid from a portable
container (not
shown). The hand pump 2 has a handle 5 and a handle passage 20a extending
therethrough, a
nozzle 26 having a nozzle passage 44 therethrough. The hand pump 2 also has a
fluid
chamber having a lower fluid reservoir 12 associated at one end with the
handle passage 20a,
20b and at the other end with a first end of an upper fluid reservoir 10,
wherein a second end
of the upper fluid reservoir 10 is associated with the nozzle passage 44.
Also the piston 8 is movable within the upper fluid chamber 10. The trigger 6
is pivotally
attached at a first end to an external end 28 of the piston 8 and at the
medial position to a first
end of the handle 5.
A fitting 48 is disposed between the second end of the upper reservoir 10 and
the nozzle 26.
A first needle 52 extends through the upper reservoir 10 from the internal end
30 of the piston
8 through the fitting 48 into the nozzle passage 44. A first spring 80 extends
coaxially along
the needle 52 from the internal end 30 of the piston 8 to the fitting 48. A
first valve 60 is
slidably mounted coaxially on the nozzle end of the needle 52. A second spring
86 is
disposed between the first valve 60 and the nozzle end of the needle 52. A
second needle 80
in the lower reservoir 12 has a second valve slidably mounted on its end.
The first valve 60 comprises a spherical stopper slidably mounted coaxially on
the nozzle end
of the needle 52.
The second valve comprises a second spherical stopper 70 mounted at its end.
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The piston 8 includes a cylindrical recess 51 at its internal end 30 which is
adapted to engage
the needle 52.
The invention described herein describes a method of discharging fluid from a
portable
container (not shown) by utilizing a hand pump having an inlet 18 and an
outlet 40
comprising:
(a) attaching a fluid conduit (not shown) from the inlet 18 to the portable
container (not shown), where the hand pump 2 has a first and second fluid
reservoir 10 and 12 respectively, and a fluid channe114 therebetween;
(b) displacing a trigger 6 associated with the hand pump 2 so as to displace
the
piston 8 in a first reservoir 10 and:
(i) open a first valve associated with the first reservoir 10 to discharge
fluid in the first reservoir 10 to the outlet 40;
(ii) close a second valve associated with the second reservoir 12
in the fluid discharge position; and
(c) displacing the trigger 6 associated with the hand pump 2 so as to displace
the
piston 8 in the first reservoir and:
(i) close the first valve associated with the first reservoir 10;
(ii) open the second valve associated with the second reservoir 12 so as to
fill the first and second reservoir with fluid from the portable container
in the fluid drawing position.
The piston 8 is repeatedly moved back and forth reciprocally between the open
and close
position so as to draw fluid from the fluid container into the second
reservoir 12 and up into
the first reservoir as the piston is moved back into the position shown in
Figure 5 and to
discharge the fluid in the first reservoir through the nozzle 26 when the
trigger is moved from
Figure 5 to Figure 6 (whereby the second stopper or valve 70 closes the
passage in the second
reservoir 12).
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It will be appreciated by those skilled in the art that other variations of
the preferred
embodiment may be practised without departing from the scope of the invention.
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